The fuel tank on my 68 MFG Chevron has gauge on the tank.
Is there a gauge i can put on the dash from that period? As you can see it just screws off. I was hoping to find something that would just screw on in place of the original for the sending unit, and a gauge for the dash to match the tach and speedo.
You can have electric sending units made to your specs, the start around $200.00. Electrical sending units are rather fragle and would not last long in a portable tank. I would suggest going with a mounted tank that is made to accept an electrical sending unit. The gauge and sending unit you choose MUST be rated for the same OHMS to get accurate reading.
As suggested you can modify the fuel tank to accept a 5 screw sender, but I think that I would either modify the mounting flange of the new sender, or we have possibly the correct thread-on cap to which a new sender can be attached (see pictures). This thread-on cap is brass, and has an inside diameter of 1.9625 inches. The male threads of the fuel tank opening would be a little larger than this measurement I would think.
The flanged threaded piece on your tank the fuel gage is threaded to is called a bung. Yours is most likely soldered on to the tank. If the flange is the right size, that bung could be cut flush for a 5 screw type. It would be great to find a bung mount sending unit that would just screw on what you have, like the Joe posted but you would need the float to go with it.
I'm using aluminum "Gasser" style tanks in my Manta Ray. They did not come with the sending unit bungs so I need to weld them in. The new sending unit have a vertical float and will just thread on like like your gauge. The aluminum bung are about $20ea steel is cheaper. The only thing I don't care for on the new ones is the black plastic cap, like Joes brass one better.
Overtons carries a lot of poly tanks, and most made by Moeller. I put a Moeller on a pontoon boat a few years ago and was thrilled with it. Afaik they made just about every size tank known to man. Was also in a boat salvage yard near Clearwater, FL a few weeks ago and ran across a trailer that had tanks on tanks on tanks. I'd be shocked if you couldn't track down one that'd fit that space.
I know this is a long shot, but I was hoping you had managed to change your fuel gauge for a dash reading. I am hoping you have kept your old fuel gauge (the one fitted on your portable gas tank) which I would be interested in buying if you want to sell it of course. Thanks for letting me know by email, or on this forum.
Happy New Year All!
Antoine, I hopefully was successfully sending you an e-mail. We do have two lengths of new old stock mechanical fuel gauge units for a bung type mounting, and depending on the fuel tank's depth.